cleanup i18n messages

PS1: remove redundant messages; complete missing qqq's
PS2: complete docs for missing params in qqq
PS3: remove redundant messages passed along through ResourceLoader
PS4: use $wgResourceModules instead of deprecated ResourceLoaderRegisterModules hook

Change-Id: If9efd1a7c597639524ff4b9eb3163832ed5895c8
Merge "cleanup i18n messages"